Schlumberger introduces armour cladding alloy for drill bits

schumSmith Bits, a Schlumberger company, has introduced Aegis armor cladding that improves bit body design flexibility and erosion resistance, increase rate of penetration (ROP) and bit durability for longer runs

Composed of a proprietary tungsten carbide material, Aegis cladding increases bit erosion resistance by 400 per cent and strength by 40 per cent when compared to conventional matrix polycrystalline diamond compact (PDC) bits, according to Schlumberger.

Kristi Vilay, president, Bits and Drilling Tools, Schlumberger, said, “Our new armor cladding technology combines innovative materials science with an electron-beam additive manufacturing process.”

“This new manufacturing approach allows us to integrate new proprietary material into our customised, fit-for-basin bits, providing a differentiated technology to improve our customers’ overall drilling performance,” she added.

In addition to improving erosion resistance, Aegis cladding enables bit designs with taller blades and optimal nozzle placement. This results in more efficient cuttings evacuation that improves ROP.

Aegis cladding has undergone extensive field testing across five shale basins in North America. The technology has also been field-tested in Europe, the Middle East and South America for both onshore and offshore applications.

In Oklahoma’s Anadarko Basin, two steel-bodied bits with Aegis cladding were deployed for an international oil and gas company in eight wells for a total of eight-bit runs. The use of Aegis cladding enhanced the fit-for-basin bit design with taller blades and optimal nozzle placement.

This increased ROP by 36 per cent compared with direct offset runs of matrix PDC bits and saved the customer an estimated 179 hours of drilling time across the eight runs.

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